Data fails to be exported to Excel using the shared component, “Download Data Subset”.
An error is seen in the log that indicates a class is missing, despite the plugin previously working. An error similar to the following is seen in the server log:
[[ACTIVE] ExecuteThread: '29' for queue: 'weblogic.kernel.Default (self-tuning)'] ERROR com.appiancorp.ra.workpoller.WorkItemListener - The following exception occurred while attempting to complete work item [(WorkId: 10, WorkType: [ExpressionGroupRequest: expressionGroupId=442, [ExpressionGroup as '1234567' context [Task:123]: isFileCorrect:readexcelsheet(pv!excelDocument_doc,0,1,1).result.values="Instructions" with values
Caused by: javax.ejb.EJBException: EJB Exception: : java.lang.NoClassDefFoundError: Could not initialize class org.apache.poi.openxml4j.opc.internal.marshallers.ZipPackagePropertiesMarshaller
The shared component, “Excel Tools”, contains a newer version of the same class referenced by “Download Data Subset”, causing a class loader conflict.
This article applies to all versions of Appian.
Last Reviewed: April 2017
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